﻿/*
 * This file is part of MonoStrategy.
 *
 * Copyright (C) 2010-2011 Christoph Husse
 *
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU Affero General Public License as
 *  published by the Free Software Foundation, either version 3 of the
 *  License, or (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU Affero General Public License for more details.
 *
 *  You should have received a copy of the GNU Affero General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 * Authors: 
 *      # Christoph Husse
 * 
 * Also checkout our homepage: http://monostrategy.codeplex.com/
 */
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace MonoStrategy
{
    internal partial class TerrainRouting
    {
        private class SpaceTimeMap
        {
            private Map<PathNodeKey, MovablePathNode> m_Entries = new Map<PathNodeKey, MovablePathNode>(MapPolicy.None, PathNodeKey.Comparer);

            internal IEnumerable<MovablePathNode> GetPathList(Point inCell)
            {
                PathNodeKey key = new PathNodeKey(inCell.X, inCell.Y, 0);

                return from e in m_Entries.Search(key, PathNodeKey.ComparerIgnoreTime) select e.Value;
            }

            internal void Remove(PathNodeKey inKey)
            {
                m_Entries.Remove(inKey);
            }

            internal MovablePathNode this[PathNodeKey key]
            {
                get
                {
                    MovablePathNode result;

                    m_Entries.TryGetValue(key, out result);

                    return result;
                }

                set
                {
                    if (m_Entries.ContainsKey(key))
                        m_Entries[key] = value;
                    else
                        m_Entries.Add(key, value);
                }
            }

            internal void Clear()
            {
                m_Entries.Clear();
            }
        }
    }
}
